Buggy code:
public class TestCacheManager extends JMeterTestCase { private class URLConnectionStub extends URLConnection { protected URLConnectionStub ( URL url ) { } private URLConnectionStub ( URLConnection urlConnection ) { } @ Override public void connect ( ) throws IOException { } private String expires = null ; private String cacheControl = null ; @ Override public String getHeaderField ( String name ) { } @ Override public URL getURL ( ) { } } private class HttpMethodStub extends PostMethod { private Header lastModifiedHeader ; private Header etagHeader ; private String expires ; private String cacheControl ; HttpMethodStub ( ) { } @ Override public Header getResponseHeader ( String headerName ) { } @ Override public URI getURI ( ) throws URIException { } } private static class HttpURLConnectionStub extends HttpURLConnection { private Map < String , List < String > > properties ; public HttpURLConnectionStub ( HttpMethod method , URL url ) { } @ Override public void addRequestProperty ( String key , String value ) { } @ Override public Map < String , List < String > > getRequestProperties ( ) { } } private static final String LOCAL_HOST = "http:////localhost//" ; private static final String EXPECTED_ETAG = "0xCAFEBABEDEADBEEF" ; private static final TimeZone GMT = TimeZone . getTimeZone ( "GMT" ) ; private CacheManager cacheManager ; private String currentTimeInGMT ; private URL url ; private URI uri ; private URLConnection urlConnection ; private HttpMethod httpMethod ; private HttpURLConnection httpUrlConnection ; private SampleResult sampleResultOK ; public TestCacheManager ( String name ) { } private String makeDate ( Date d ) { } @ Override public void setUp ( ) throws Exception { } @ Override protected void tearDown ( ) throws Exception { } public void testExpiresJava ( ) throws Exception { } public void testNoExpiresJava ( ) throws Exception { } public void testCacheJava ( ) throws Exception { } public void testExpiresHttpClient ( ) throws Exception { } public void testCacheHttpClient ( ) throws Exception { } public void testPrivateCacheHttpClient ( ) throws Exception { } public void testNoCacheHttpClient ( ) throws Exception { this . cacheManager . setUseExpires ( true ) ; this . cacheManager . testIterationStart ( null ) ; assertNull ( "Should<seq2seq4repair_space>not<seq2seq4repair_space>find<seq2seq4repair_space>entry" , getThreadCacheEntry ( TestCacheManager . LOCAL_HOST ) ) ; assertFalse ( "Should<seq2seq4repair_space>not<seq2seq4repair_space>find<seq2seq4repair_space>valid<seq2seq4repair_space>entry" , this . cacheManager . inCache ( url ) ) ; ( ( TestCacheManager . HttpMethodStub ) ( httpMethod ) ) . cacheControl = "no-cache" ; this . cacheManager . saveDetails ( httpMethod , sampleResultOK ) ; <START_BUG> assertNull ( "Should<seq2seq4repair_space>find<seq2seq4repair_space>entry" , getThreadCacheEntry ( TestCacheManager . LOCAL_HOST ) ) ; <END_BUG> assertFalse ( "Should<seq2seq4repair_space>not<seq2seq4repair_space>find<seq2seq4repair_space>valid<seq2seq4repair_space>entry" , this . cacheManager . inCache ( url ) ) ; } public void testCacheHttpClientBug51932 ( ) throws Exception { } public void testGetClearEachIteration ( ) throws Exception { } public void testSaveDetailsWithEmptySampleResultGivesNoCacheEntry ( ) throws Exception { } public void testSaveDetailsURLConnectionWithSampleResultWithResponseCode200GivesCacheEntry ( ) throws Exception { } public void testSaveDetailsHttpMethodWithSampleResultWithResponseCode200GivesCacheEntry ( ) throws Exception { } public void testSaveDetailsURLConnectionWithSampleResultWithResponseCode404GivesNoCacheEntry ( ) throws Exception { } public void testSaveDetailsHttpMethodWithSampleResultWithResponseCode404GivesNoCacheEntry ( ) throws Exception { } public void testSetHeadersHttpMethodWithSampleResultWithResponseCode200GivesCacheEntry ( ) throws Exception { } public void testSetHeadersHttpMethodWithSampleResultWithResponseCode404GivesNoCacheEntry ( ) throws Exception { } public void testSetHeadersHttpURLConnectionWithSampleResultWithResponseCode200GivesCacheEntry ( ) throws Exception { } public void testSetHeadersHttpURLConnectionWithSampleResultWithResponseCode404GivesNoCacheEntry ( ) throws Exception { } public void testClearCache ( ) throws Exception { } private void checkRequestHeader ( String requestHeader , String expectedValue ) { } private static void checkProperty ( Map < String , List < String > > properties , String property , String expectedPropertyValue ) { } private SampleResult getSampleResultWithSpecifiedResponseCode ( String code ) { } private Map < String , CacheManager . CacheEntry > getThreadCache ( ) throws Exception { } private CacheEntry getThreadCacheEntry ( String url ) throws Exception { } private void saveDetailsWithHttpMethodAndSampleResultWithResponseCode ( String responseCode ) throws Exception { } private void saveDetailsWithConnectionAndSampleResultWithResponseCode ( String responseCode ) { } private void setHeadersWithHttpUrlConnectionAndUrl ( ) { } private void setHeadersWithUrlAndHttpMethod ( ) { } }

Fix:
assertNotNull ( "Should<seq2seq4repair_space>find<seq2seq4repair_space>entry" , getThreadCacheEntry ( TestCacheManager . LOCAL_HOST ) ) ;